导数示波极谱法测定镉试剂

• 作 者: 张振辉 徐远清
• 机 构: 江西大学化学系,江西大学化学系,
• 出 处: 化学试剂
• 发表日期: 1987年06期
• 关键词: 镉试剂 极谱波 还原波 示波极谱法 吸附波 直线关系 氢氧化钠溶液 导数 示波极谱 滴汞电极

镉试剂在0.32M氢氧化钠溶液中有清晰的还原波,峰电位在—O.60伏和—O.70伏,第一波可用来定量分析镉试剂。镉试剂的浓度在1.6×10_(-7)至1.3×10_(-6)M间,峰电流和浓度成直线关系。本文研究了镉试剂的极谱行为和极谱波性质。结果表明,镉试剂的极谱波是一吸附波,电极反应系镉试剂分子中-N=N-键的还原所致。

The cadmium reagent has a clear reduction wave in 0.32M sodium hydroxide solution with peak potentials of -0.60 volts and -0.70 volts. The first wave can be used to quantify cadmium reagents. The concentration of cadmium reagent ranged from 1.6 × 10 (-7) to 1.3 × 10 -6 (-6) M, and the peak current was linear with the concentration. In this paper, the polarographic behavior and polarographic wave properties of cadmium reagents were studied. The results show that the polarographic wave of cadmium reagent is an adsorptive wave. The electrode reaction is due to the reduction of -N = N-bond in the molecule of cadmium reagent.